filter: new internal function is_blank_line()

It's simply to return (regexec(&regex_blank_line, str, 0, NULL, 0) == 0);
The reason for encapsulation is to allow replacing this with a
non-regex method if necessary.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/filter.c b/src/filter.c
index 35b80a9..fd1bb40 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -324,6 +324,11 @@ int filter_tee_header (struct filter *chain)
 	return 0;
 }
 
+static bool is_blank_line (const char *str)
+{
+	return (regexec (&regex_blank_line, str, 0, NULL, 0) == 0);
+}
+
 /** Adjust the line numbers in the #line directives of the generated scanner.
  * After the m4 expansion, the line numbers are incorrect since the m4 macros
  * can add or remove lines.  This only adjusts line numbers for generated code,
@@ -395,9 +400,7 @@ int filter_fix_linedirs (struct filter *chain)
 		}
 
 		/* squeeze blank lines from generated code */
-		else if (in_gen
-			 && regexec (&regex_blank_line, buf, 0, NULL,
-				     0) == 0) {
+		else if (in_gen && is_blank_line(buf)) {
 			if (last_was_blank)
 				continue;
 			else